In your Java program you may have a requirement to convert a char to String or to convert a String to char. This post shows different options to do these conversions. Convert char to String in Java For converting char to String in Java there is a toString() method in…
Some times you may need to list all the files in a directory to get a specific file, to read all the files or to zip a folder where you need to go through the whole folder tree structure. This post shows how you can list all the files and…
If you have to read input from console in Java there are 3 options. Using BufferedReader class. Using Scanner class, available from Java 5. Using System.console() method, available from Java 6. Using BufferedReader class By wrapping the standard input stream “System.in” in an InputStreamReader which is further wrapped with in…
When you zip a file in Java there are code changes based on whether you are zipping a file or you are zipping a folder in Java where the whole directory structure is archived. But unzipping a file in Java doesn’t need such different functionalities. One Java program to unzip…
In the post How to Zip Files in Java we have seen how to zip a single file or multiple files in Java but you may also need to zip a folder in Java where you also retain the folder tree structure while zipping it. This post shows how to…
This post shows how you can zip files in Java. Using the options given here you can zip a single file or more than one file by specifying all those files. Zip a file in Java To zip files in Java there are two options- Using ZipOutputStream and ZipEntry classes…
This post shows how to get the last modified date of a file in Java. There are more than one options to get the last modified date of a file- You can use the File.lastModified() method to get the time that the file was last modified. You can use the…
Write a Java program to check if given String is subsequence of another string is asked quite often in Java interviews. If you have two strings str1 and str2 then str1 is a subsequence of str2 if all the characters in str1 are found in str2, characters may not be…
In this post we’ll see how to convert double to int in Java. Considerations while converting double to int in Java While converting double to int two things you need to consider are- Range of double is much more than the int, if the double you are trying to convert…
In this post we’ll see how to convert float to int in Java. Considerations while converting float to int in Java While converting float to int two things you need to consider are- Range of float is more than the int, if the float you are trying to convert to…